Chapter 4: BACKING UP AND RESTORING DATA ppt

BACKUP SOFTWARE• Windows Server 2003 Backup • Third-party software... TYPE OF BACKUPSIncremental Modified since last full or incremental backup ClearDifferential Modified since last ful

BACKING UP AND RESTORING DATA

Chapter 4

CHAPTER OVERVIEW

• Describe the various types of hardware used to

perform backups

• Understand the difference between full,

incremental, and differential backup jobs

• List the capabilities of the Windows Server 2003

Backup program

• Back up and restore an Active Directory database.

• Use volume shadow copies.

BACKING UP DATA

• Why do we back up data?

• Why do we need to back up data?

BACKUP HARDWARE

• Capacity

• Speed

• Cost

CD-ROM AND DVD-ROM

• CD

• DVD

CARTRIDGE DRIVES

• Proprietary technology

• Zip (Up to 750-MB capacity)

• Jaz (2-GB capacity)

MAGNETIC TAPE DRIVES

• Use single or double spool magnetic cartridges

• Low cost per megabyte

• Large capacity

• Reduce the need for manual intervention in

backups

• Allow you to back up more data

• Preserves investment in media

SELECTING A DRIVE INTERFACE

• IDE

than one device per channel

BACKUP SOFTWARE

• Windows Server 2003 Backup

• Third-party software

TARGET SELECTION

• Anything that is to be backed up is considered a

backup target, including:

USING TREE SELECTION

USING FILTERS

• Filter on file creation date/time, size, or type

• Allows you to perform customized backups

• Can reduce the time needed to back up and the

amount of media required

TYPE OF BACKUPS

Incremental Modified since last full or

incremental backup ClearDifferential Modified since last full or

incremental backup Not ResetCopy Backup – ignoring the

Daily Based on today’s date Not Reset

BACKUP JOB TYPES: NORMAL

• Backs up all files

• Clears the archive bit

• Can require large data storage capacity

BACKUP JOB TYPES: INCREMENTAL

• Backs up only files that have been modified or

created since the last full or incremental backup

• Clears the archive bit

• Can require considerably less storage space than a

normal backup

• Faster to backup than differential, longer restore

BACKUP JOB TYPES: DIFFERENTIAL

• Backs up only files that have been modified or

created since the last full or incremental backup

• Does not clear the archive bit

• Can require considerably less storage space than a

normal backup

• Longer to backup than incremental, faster restore

COPY JOBS AND DAILY JOBS

• Copy job

• Daily job

SPECIFYING A BACKUP JOB TYPE

JOB SCHEDULING

• Allows backups to be performed during off-hours

• Reduces potential for administrative error

MAINTAINING BACKUP LOGS

• Allows backup software to keep track of what file is

on what tape

• Eliminates the need for administrators to remember

detailed information about the contents of a tape

• Can be stored on the system hosting the backup

software or the tape

MEDIA ROTATION

• Provides a method to retain backups for a given

period

• Prevents overuse of media

Common rotation methods include:

• Grandfather-Father-Son

• Tower of Hanoi

• Data compression that can often double the amount of

data written to a tape, with little or no performance impact

RESTORING FULL BACKUPS

• Easiest of all backup methods to restore

• Restores latest full backup

• Restores the latest full backup

• Restores incremental backups from oldest to most

recent

• Number of restore steps depends on the time since

the last full backup

• Restores the latest full backup

• Restores the latest differential backup

• Only two restore steps are required

DISASTER RECOVERY

USING WINDOWS SERVER 2003 BACKUP

VOLUME SHADOW COPY

• Periodically saves copies of files

• Can be used to restore previous versions of a file

• Available only in Windows Server 2003 and

Windows XP

• Also used by Windows Server 2003 Backup to

make copies of open files

ENABLING VOLUME SHADOW COPY

BACKING UP ACTIVE DIRECTORY

RESTORING ACTIVE DIRECTORY

• Can only be performed through Directory Services

Restore Mode

Nonauthoritative restore

• Used to rebuild a domain controller that has been

damaged, using the latest Active Directory

information from your other domain controllers

Authoritative restore

• Used when you want to recover Active Directory

objects that have been accidentally deleted using a System State backup

SUMMARY

• A network backup solution consists of backup hardware,

backup software, and a plan for using them.

• Incremental and differential backup jobs use the archive bit

to determine what files need to be backed up.

• Network backup software enables you to back up data

from computers anywhere on the network.

• Volume shadow copy enables users to access copies of

files they have accidentally deleted or damaged.

• In Windows Server 2003 Backup, the System State object

provides an easy way to back up Active Directory.

• Active Directory can be restored only through Directory

Services Restore Mode.